gcc-wwwdocs branch master updated. 79b804a9bda634f0efad4fe15564d1b2374adb35

gcc-wwwdocs branch master updated. 79b804a9bda634f0efad4fe15564d1b2374adb35

[Alexandre Oliva]

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- Log -----------------------------------------------------------------
commit 79b804a9bda634f0efad4fe15564d1b2374adb35
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Wed Dec 20 04:57:24 2023 -0300

    new AdaCore-contributed hardening features in gcc 13 and 14
    
    Mention hardening of conditionals (added in gcc 13), control flow
    redundancy, hardened booleans, and stack scrubbing.
    
    Also cover forced inlining of string operations while at that.

diff --git a/htdocs/gcc-13/changes.html b/htdocs/gcc-13/changes.html
index ee6383a0..d3bacc16 100644
--- a/htdocs/gcc-13/changes.html
+++ b/htdocs/gcc-13/changes.html
@@ -168,6 +168,12 @@ You may also want to check out our
     been added, see also
     <a href="https://gcc.gnu.org/onlinedocs/gcc/Freestanding-Environments.html">Profiling and Test Coverage in Freestanding Environments</a>.
   </li>
+  <li>
+    New options <code>-fharden-compares</code>
+    and <code>-fharden-conditional-branches</code> to verify compares
+    and conditional branches, to detect some power-deprivation
+    hardware attacks, using reversed conditions.
+  </li>
 </ul>
 
 
diff --git a/htdocs/gcc-14/changes.html b/htdocs/gcc-14/changes.html
index 11c7ca7e..24e6409a 100644
--- a/htdocs/gcc-14/changes.html
+++ b/htdocs/gcc-14/changes.html
@@ -128,6 +128,35 @@ a work-in-progress.</p>
     of hardening flags.  The options it enables can be displayed using the
     <code>--help=hardened</code> option.
   </li>
+  <li>
+    New option <code>-fharden-control-flow-redundancy</code>, to
+    verify, at the end of functions, that the visited basic blocks
+    correspond to a legitimate execution path, so as to detect and
+    prevent attacks that transfer control into the middle of
+    functions.
+  </li>
+  <li>
+    New type attribute <code>hardbool</code>, for C and Ada.  Hardened
+    booleans take user-specified representations for <code>true</code>
+    and <code>false</code>, presumably with higher hamming distance
+    than standard booleans, and get verified at every use, detecting
+    memory corruption and some malicious attacks.
+  </li>
+  <li>
+    New type attribute <code>strub</code> to control stack scrubbing
+    properties of functions and variables.  The stack frame used by
+    functions marked with the attribute gets zeroed-out upon returning
+    or exception escaping.  Scalar variables marked with the attribute
+    cause functions contaning or accessing them to get stack scrubbing
+    enabled implicitly.
+  </li>
+  <li>
+    New option <code>-finline-stringops</code>, to force inline
+    expansion of <code>memcmp</code>, <code>memcpy</code>,
+    <code>memmove</code> and <code>memset</code>, even when that is
+    not an optimization, to avoid relying on library
+    implementations.
+  </li>
 </ul>
 <!-- .................................................................. -->
 <h2 id="languages">New Languages and Language specific improvements</h2>

-----------------------------------------------------------------------

Summary of changes:
 htdocs/gcc-13/changes.html |  6 ++++++
 htdocs/gcc-14/changes.html | 29 +++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)


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